bacon



'(i. M. BACON. v MULTPLYING MACHINE.

APPLicATloN FILED Nov. 2, 191.6`

Patented Apr. 27, 1920.

4 SHEETS-SHEET l.

alffozumj G. M. BACON.

MULTIPLYING MAcHxN' APPLICATION FILED NOV. 2, i916- 1,338,274. Patented Apr. 27, 1920.

4 SHEETS-SHEET 2.

Inwnoz ElenrgeMlanmn anormal;

G. M. BACON.

.MULTIPLYING MACHINE.

APPLICATION HLEn.Nov. 2, 191s.

1,338,274.. Patented Apr. 27, 1920.

4 SHEETS-SHEET 3.

G. M. BACON.

MULTIPLYING MACHINE..

APPLICATION FILED Nov.2. 1916.

Patnd Ap1.-27, 1920.

4 SHEETS-SHEET 4.

Beal-ge M Elacm,

- Multiplying-Machines, of Which the follow-- OFFICE,

To all whom may concern.v

Be it known that I, GEORGE M. Bacon, a citizen of the UnitedStates,` and a resident of Salt Lake City, in the county of` Salt Lake and State of Utah, have invented certain new and useful Improvements in inOj is a specification.

the class of registers, and more specifically to multiplyingrmachines, manually operable, and wherebyl the product of multiplying numbers may 'be' determined.. i

The principal objects of my invention are, first, toprovide' machines of the character described with which-it is merely necessary f tomanually set olf, as at sight openings',

numerals, on dials to represent .the multi- `plicand, and others to set off numerals, as

at other sight openings, to represent the multiplier, directly after which the product appears, as at other suitable sight openings, vwithout the necessity of operating a crank, lever,-;or other element, 'aftei-the multiplicand and multiplier have been set off, in order to determine the product; second, to provide multiplying machines by which the multiplier and'product may be quicklyieset atzero, leaving the multiplicand set, as when it is involved in one or more subsequent calculations under which conditions, it is necessary to re-set merely the new multiplier,'an'd the product is made visible;

' and, third, toprovide multiplying machines which are compact, neat in appearance, and embodying a minimum numberof movable elements according to the vcapacity of the machine.

Others objects of my invention will appear in the following detailed description,

` taken .in connection with the accompanying drawings, forming ai part of this specification, and inwhich drawings 'Figure 1 .is a 'horizontal sectional view through a machine constructed according Vto my invention; and showing the parts,

f rig. 1.

wypresent invention relates broadly, to

" v f shortening nAcoNjQoF 'SALTTLAKE `UTAH'.

A'MUIQIrLYtNG-MACHI'N'E.

p I w AvS'171etipification of Lettrsiluateiit. Patenfed Apr; 27, 1920, i Y Applicatioiirld November 2, 1916.- Serial No. 129,176.

Fig. 5 isa perspective-view of the machine complete.

Pig. 6 is a. detail view, on an enlarged scale, partly in plan and partly 4in horizontal section of product dials, and devices coperating with said dials whereby one is moved one digit upon a complete tuin of the adjacent dial at the right.

Fig. 7` is a View partly Vin elevation and partly in vertical section of the mechanism shown in Fig. (i, and partly on the line7--7 of Fig. 6. U

Fig. through one of the product dials and asso ciated mechanism.

Fig. 9 is a partial plan view of a differ ential wheel forming a part of the machine.

Fig. 10. is an enlarged view partly in elevation and partly insection of motion transmittiiig means.

8 is. fa horizontal sectional view..

mechanism for adjusting the position of said sets of selective pinions independent one of another with respect to said difer- I ential cog-wheels; E-multiplicand dailsmov-A able with mechanism D;- F mechanisms for rotating said sets of differential cog-wheels independently one of another; G multiplier dials movable with mechanisms F; H prod- J uct dials; J means for imparting movement of the selective pinions of sets (lk to said dials H; K devices cooperating with dials H whereby one .is moved one digitupon a completeturn of its adjacent dialvat the right; L mechanism for re-setting dials G; M mechanism for resetting dials H; and, N'mechanism for re-setting ldials E.`

Referring 'lirst to the' housing ."Ahas clearly shownin Fig. 5 of the drawings, it -is preferred ,to lform said housing with a stepped front portion, through the upright walls 13 and l-liofrwhich lextend manually operable members vas hereinafter set forth, v

-While faces 15 and 16 are provided with sight openings17 and 18, respectively. The remaining portion of the top of the housing is preferably plane, and constituting the major portion of the top is Well adapted to support data pertinent to calculation.

f yReferring now to the sets of differential cog-wheels B, in the example shown, three sets are provided, as showin-primary set 19, second set 20, and third set 2l. Each set comprises three differential wheels 22 jmovable in unison, as by being provided .particular series is an increase over the ninna shaft 3T projectingY through the upright, 14 of housing A, and provided with 'a 'button 38 exteriorly of said housing; a pair of spiral gears 39 and 4() with axes at a right angle, the gear 39rigid with shaft 37; a pinion 41 rotatable with spiral gear 40; and, a guide bar 42 provided with a .rack 43, parallel to the axis of shaft 37, and co-meshing` with pinion 41. The guide bar 42 extends above and over the sets of differential. wheels and4 is provided with three recesses 44, one for each pinion 36 of its respetive set of selective pinions. Each guide bar '42 may be guided in a line of movement paral lel to rack 43 as Yby pins 45 and 46 extending through elongated slots 4T and'48 respectively, the yaxes of these slots being parallel to the rack 43. Each pinion 31S may be provided with an enlargement 49 ber of cogs in the next adjacent inner series i equal 'to the number of cogs making up\the` innermost series. That is, the number of cogs in series 25 is twice that making up series 24,- and likewise the number of teeth in series 26 is three times the number of teeth in series 24, this for a purpose to be subsequently set forth. The sets of diifer entia-l'ivheels are arranged, in the example shown, with the initial Wheel of the primary set 19 nearest the right of the, machine, the initial Wheel of the second set and the second Wheel of the primary set next adjacent to the left; the initial Wheel of the third set, second Wheel of the second set, and third Wheel of the primary set, next adjacent the left; and, the .third Wheel of the third set next adjacent to the left, as is clearly shoivn in F ig. 6. In other Words, inthe example shown, the axes of the Wheels of each set are in a common plane, and the planes of the sets are in parallel relation, and the initial and succeeding wheels of the sets have their axes in common planes, the outermost of said planes comprehending a diamond.

rjAs tothe sets of selective pinions C, in the example shown, three sets are provided,'- a first set .33 for the initial wheels of the said sets of differential wheels; a se?- ond set 34 for the second Wheels of the said sets of differential wheels.; and a .third set `35 for the third Wheels of the said sets of differential Wheels. Each set comprises threepinions 36, one for each differential Wheel, and in the example shown, these pini `ions contain theysame number of cogs. as

ently of the Aother sets with respect to its sety of differential cog-Wheels, the mechamsms D are provided. Each may comprise which engages the confronting wall of its respective' slot 44, so that the cogs of ai pinion cannot engage the guide bar.` Thus, by rotating any button 38, the Aguide Abar through the motion transmitting means com )rising the shaft 37 s )iral Tears39 and y 40, pinions 41 and the rack43 of the guide bai', which enables an operator to dispose all of the pinions of any particular -set uniformly iii ico-meshing relation with a selected series of teeth on the differential ivheels'ivitli which the pinions coperate.

In order that an operator may quickly arrange the sets of selective pinions as desired, the multiplicand dials E are provided, movable ivith mechanisms D.` Referring more specifically to Figs. 1 and 5, of the dials E, that designated 50 represents units, each dial provided With digits l through 9, and including O, Dial 51 represents tens, and dial 52 .hundreds. One digit of each dial is visible at a sight opening 1S, it being preferred tovprovide delineations 52 designating the sight openings through which digits are visible and repre-v senting the multiplicand. The dials E are normally at 1, at which time the pinions of their respective sets are in (to-meshing relation with the first series, that designated 24, of their respective differential wheels.` The motion transmitting means between any button 3S and guide bar 42 is such that when the button is turned to advance its dial from one digit to another, all of the selective pinions of its particular set are moved from one series of cogs on the differential to the next adjacent series.

Referring now to the mechanisms F for rotating tht` sets of differential wheels independently one of another, each mechanism may comprise a shaft bevel gear 54 rigid with said shaft; a comeshing bevel, gear and a spindle 56 for the initial differential wheel of the series, the shaft 53 extending through the upright wa1l`14 of l2 cooperating therewith may be moved housing A, and provided with a button 5T whereby the shaft may be manually rotated. 'In the'example shown.the gear 51 is of a diameterlwith respect to gear 55, ,that upon one complete turn ofthe shaft 53 and itsI 4geaipfli,l two complete turns are imparted to gear 55 and hence the spindle 56 of the initial. differential wheel.

Ofthefmultiplier dials (i, Jthat designated le 57has digits thereon representing units and isrigid with the sha-ft 53 fo'rminga part ofthe rmotion transmitting means between the first button 57 at the right, and the vinitial differential wheel of the first set 19, l5 these digits being visible at sight openings 18 in the housing A.V The next adjacent dial 58 is rigid with .the shaft .i3 forming a part of motiontransmitting means between thesecondfbutton 57 and the initial wheel 20 zofsetQO of the di'erenthil wheels. the dial 58 representing tensrlihat dial designated 59,7representing hundreds7 is rigid ,Y with-the Ashaftforming a part of motion transmitting means between the third but- '25mn' and' t/heinitial'wheel oflset 21 of the differential wheels. '.It' is preferred to arrangethe bevel gears 54 and 55 of the motion' transmitting means associated with dial 58 so'that'. its respective initial wheel of set 20 will'berotated in a direction counter to that imparted by movement of outermost button-57 to the initial wheels of sets 19 andi f9.1, as obvious from an inspection of Figlt of the drawings. In order to set any h5 particular set of differential wheels into motion,the`operator has merely to rotate its re'spectivebutton 57 clockwise.

,The'product dials H 'are' arranged to be visible at the sight openings 17 of housing 461` A., andin'the example shown are designated by characters 60 and 65 inclusive. The

, dials at the right designatedV 60 represent units, dial 61 tens, dial 62 hundreds,

dial 68 thousa'nds, dial 64 tens of thousands, and dial 65 hundreds of thousands.

Means J is adapted to transmit movement of the selective pinions to the product dials, and in the example shown, contemplates the provision o f a polygonal transverseway 66, in each selective pinion.` The means may comprise a shaft 67 for each dial H, one or more hollow polygonal bars about the shaft and fitting into the way of the pinion; and a device 69 for each bar 68 adapted to impart movement of the bar in one direction to the shaft. In the example shown, each device 69 comprises a ratchet wheel 7 0 rigid with the shaft 67, a carrier 71 rigid withl 'and at one end portion of the bar 68 ;"a pawl 72 coperating with ratchet wheel 76 and supported by carrier 71; and, a spring 73 acting upon the pawl 72, maintaining it in engagement with the `ratchet wheel. 1

Withreference lto Fig. 1, since, in the ex- $5' ample shown, the shaft of dial60 rotates;

vwise, and hence 'the devices'associated with Lj i such shafts as rotate clockwise are1 con- 'v' structed as shown in Fig. 10 of the drawing.

It is to be observed that any of these shafts 75 may rotate in a direction counter to that necessary for advancing the digits successively, without imparting movement to the dials since the pawls72 will ride overthe teeth of the ratchet wheels 76. It 'is also to be ob- 80 served that any particular shaft 53 provided with a plurality of devices 69 may be rotated through t-he instrumentality of any one of the selective pinions upon said shafts, without affecting` the* other selective pinions. F or instance, assuming that motion is being imparted to the wheels of set 19, the selective pinion co-meshing with a series of cogs ou the second wheel of. series 19 will be moved clockwise. This movement will be imparted '90, to the shaft 53 of dial 61 through the polyg-A onal bar 68 and device 69 directly lassociated with the said selective pinion, however7 the f selective pinion co-meshing with a series of. cogs on the initial wheel of set 2O will be 95 i unaffected, since theratchet wheel 70 of device 69 associatedl with said. second men.-

tioned selective pinion will merely oscillate its pawl 72, and there is then lost motion between shaft 53, and the second mentioned selective pinion.

In -order that `th e product will be accurately made visible at the sight openings 17 of housing A, the devices K are )provided whereby any dial H is. moved one digit upon a complete turn of its adjacent dial at the right, or in vother words, after one dial lhas passed'througha Vphase of movement from zero back to zero, the next ad'- jacent. dial to the left is'moved one digit. 110

VEach device may comprise a -drum 74 rigid with the shaft of the dial to be moved upon a complete turnofthe next adjacent dial to the right, said drum provided at its periphery with ten transverse slots the bot- 11.5 ,toms of said slots converging tdward one end of the shaft, and in the example shown, toward the selective pinions, so as to be shallow at one end portion of the drum and deep'at the other end portion. thereof, and 120 ten' spiral grooves 76. leading from'but deeper -than the shallow end of; said first mentionedgrooves, but more shallow than the deep endof the next adjacent of said grooves," as is clearly showin inl Fig.A 6 vof '125 the drawings,.said drum fitting in a hollow 77- of its',respective dial;v a disklike member-78:freely-mounted (mythe shaft 67, but .movable with they, dialrH, and" provided with afpolygonal;projection 79grwhichiex- 1,30

tion A80 in the lhub 81 ofthe dial; a pin 82 yieldably carried bythe dial, as through springs 83 fitting in a longitudinal slot 84 inthe face of the dial, this pin normally fitting into the deep part of one of the spirall grooves 76; a spring 85 yieldably disposing said dial with said pin in a normal position, but permitting the dial to move longitudinally of shaft 67 a wedgeshaped projection 86 on the 'face of the disk 78 of the next adjacent 'device K to the right; and, a pivoted lever 87 one arm 88 for engagement ivith the disk 7 8 of the preceding evice K, and the other arm to engage the one end portion of the disk to be advanced. l

Th'e operation of each device K is as folmoved. At-this point, the wedgeySG has moves the' next adjacent dial to the. left longitudinally of its shaft 67. `The pin 82 of the dial H then rides in the spiral groove 76, which causes -relative movement vbetween. the product dial and its shaft one digit untily said vpin; .drops into the deep part of grooves adjacent the shallow part of the groove 76 in which the pin has' moved out of operative relation to the lever 87, the dial H responsive to spring 85, is returned to a normal position. It is'tobe observed that any dial H may not only be receiving motion through the shaft 67 to advance it from onev digit to another, but may alsofbe' actuated at 3the same time through a device K.

lie-setting of the dials Gr may beaclcrinplished 'after the machine has been brought into use and it is desired to set the dials-at zero, as by a; rack slidable on supports 91,.and provided with an operating projection 92 extending exteriorly of the housing A, and below the buttons 57, as clearly shown in Fig. 5 of the drawings; a 'spring 93 for normally holding said rack in one position; and, a plurality of pinions 94, one or each shaft- 63. The 'supports -91 arel provided with inclinedfaces 95, normally engaged by end :portions of projections 96, at the-lower'portion of rack 90. The pinions 94 are devoid of teeth, or mutilated as at 97. IBy moving therack v90 longitudinally of the supports 91, said.

rackis first raised into co-mes11ingrelation w1thany teeth on pinions 94 which may be lowermost, and movement 1s miparted -to the shafts :S3-.through said 4rack until that portion of its respective' pinion devoid'. of teeth .1s lowermost, it being understoodv102, guided in its movement, .as'by pins l103 extending through elongated slots 104 at its end portion; co-meshing'sets o'fpinion-s 105 and'106, the pinions 105 being lowermost so that their teeth will engage with tlaeatceth'y of rack 98, but that the teeth of gears. 106 will be free of said rack; mutilated gears 107 and 108l on shafts 67, as hereinafter more fully. set forth; a collar 109 about thel support 110 of each lever 87, and beneath the same,` saidcollar resting upon the carrier 102.

When it lv's desired to rc1-set the product dials, the operator merely moves the rack 101, so'as to slide upwardly, its teeth coming into meshing relation with the kteeth of pinions 105, which `inturn rotate the pin-V ions 106, these pinions engaging wgsh anyy of the teeth of mutilated gears`107 and 108, as may be adjacent the set of pinions 105 and l106 as the carrier 102is also moved upwardly responsive to actuation of the bar 101. Those portions of gears 107 and 108 as are devoid of teeth, are so arranged that when the pinions and gears are no longer in motion transmitting rglation, the digits O appear atthe sight openings'17 in the housing. The function of the collars 109 is to raise the levers 87 out of motion transmitting relation to the product dials during Aoperation 'of the re-setting mechanism, since the devices K might have a tendency to cause the digit 1.to appear at some of the sight openings during the return of rack 101 to a normal position, responsive to action of a spring 111 for the purpose of disposing the rack 98 with its ,projection 101 -fitting bef tween the supports 99, at which time the pinions 105 and 106 are out of the sphere of movement of gears 107 and 108. The' disposition of these gears, as showny inthe drawings, and their coperatingpinions, ils such as to return the product dials to indicate lzero at the sight openings, and toreset them in suclfposition, some of the dials being movable clockwise, and some contraclockwise, as hereinbefore set forth.

VThe mechanism N -is substantially the same as'` that described in connection with mechanism L, except that the dials E are turned back'or.contra-cloclnvise, and comprises a like'rack 112 mounted to slide in an opposite direction to the rack 90Vsup- 4un -.lV .2.o

.openings,.18z. of. housing A. Turning the ,ports 113, .mutilated gears 114, .rigid with rack 1121i to l:,inormal position, an extension dispose'deiiteriorly. ofl the hous- 4mg .14, beneath tliebuttons The rackv 98 may be actuated Aby anvextension- 117 projectingthrough the-upright v'walls13 vof the Ihousing A'.

",Tlieoperationfoi the machine is as fol.

Normallyfthe dials and H. are at zero,

" and the dial (iA at 91. Assuming 'that it is desired tomultiply the4 numeral 758 by l349, the operator proceeds by turning the ,unit button38.to the right until the dial 450i-,shows 81. This is followed by turning .thebutton 380i. diall 51 until said dial shows anflturningjthe button 3S of dial 52 it Shows 7. after which the'multipli- Si -is visible .at the sight cand. numeral .75

.dial caused ,its shaft 3T through'gears 39 and.40..tofturn pinion4l eight-tenths of a .set 3;'3oftl1eseleetiye pinions 49 eight-tenths vof travel ..a'nd l moving said pinions each into the series ofcogs31 or, in other words, tlie..eighth series from the center of veach di fferential-vivheelgflirstfin each set' B. rPrefeiselvthe.,sameactionl causes the vturning of to move the selective' pinions of. set 34 into meshinglrelation with the fifth series- .of .cog-s en .the second dilierential wheels of the. sets ,1|9,',20,.an,d1V 21; while the turning of dials .52,moyes theselective pinions of set rvintomeshing relation with the seventh seriesof cogs onthe third dierential wheels ofthe sets 19, 20, and 21.

The multiplier ff. 349 is vthen setoli by :using thehuttons Vhile it makes no` difference whether. it isproduced with the rigllitfr leftwhandf. button in setting off the multipliem'assuming that button 57. coper- =atesf`zwith Adial 57.', it is rotated to show digitff9, atthev sight. openings 18 at the right'` hand ,side, 'its shaft 53 will be turned nine-tenths, of a revolution, and by means of gthe'bevel gears. 5,4, 55, and the ,spindle `56, .the"diiiierential wheels of set 19 will be 50 turned'1.8`revolutions, .The turning of the lfirst.,diierentialf wheel of this set causes the r-selective,f )i'nions coperating with its eighth series off cogs to tunn `four times 1.8 or 7.2

lrevolutions.y The dial 60wfill therefore show digitlf 2 and having made seven complete revolutionlpthroiigh `means K, thedial 61 will 4show "digit u7 7. At the same time, the

`second differential jwheel of 'set 19 has turned selective pinion coperating with its .fifth `vs eries'vot' cogs,.tx\f'oand one-halt times 1.8, or

revolutions. The diall will therefore bey turned 42.5 revolutions from the position vshowing'figure "f7 or,in other Words, will .show digit 2,` while thedial 62 through means' I Willhave turned one-tenth for each .fuu' turn of da '61 ma Showv aigim?. Also at the sametime, the third .differential wheel Willhave moved its selective.pinionv -coperating with the seventh series ,of cogs, .three and one-half times 1.8, ,or-y 6.3 revolutions. The dial 62 will thereforebe. turned 6.3 revolutions `from position showingligure -5, ,or,.in other words, will show it .8 -while the dial 63, through ,means will have turned one-tenthfor each full turn of dial 62v and will -show character 6. It

'is to be observed that'the means K operates independently-of any `action-of the selective pinion andthesole function of such means is to register a' full turn of any dial by movin'g the next dial to the left one-tenth turn. This is followed by operating the next button 57 so as to disposenumeral 4 at the y.

sight opening, by means Aof dial 58.- Since the selective pinion of the initial differential wheel of set'20. is in meshing relation with the eighth series of cogs, and all of the differential wheels of set 20 make eight-tenths of a revolutionfresponsive to actuation of its button 57 the said selective pinion will be turned four times 0.8, or 3.2 revolutions.'

This actuates dial 61`3.2`revolutions from vdigit .2, and consequently shows digit 4, while three-tenths of a revolution has i ,lorov and onehalf times 0.8 or 2*.0revolution's.'

Dial 62 Will then be'turned tivo complete revolutions from l and still show 132, while the dial 63 will be advanced two 'digitsv through means K,tshowing 9.-j Simul!l 20, will turn its selective pinion co-neshing with its` seventh series of cogs,thr ee and one-half times 0.8 or 2.8'revolutions.' Dial 63 will therefore' be advanced from 9 .2.8 revolutions, andV will show. 7 and through means K will transmit motion to the dial 64 which will then show 3 atA the sight opening. '""f This is followed by actuating the third button 57. so that dial .59 shoy'vswv 5 Through the motion transmitting' means each diiferential wheel of set 21" willl be turned 0.6 of a revolution. As the initial dif# ferential Wheel ,of this set has its selective pinion'set on the eighth series of cog-s, theY` dial 62 will befadvanced" four times 0.6 ori 2.4 revolutions. This will turnfsaid dial 62 from showing digit 1 until it shows 53 in addition tof two complete revolutions which are transmitted through device K to dial 63, making it show numeral 93? At the same time the second differentiallwheel of set 21 will actuate its selective' pinion Whichis comeshing with the fifth seriesof 105 taneously, the third differential Wheel of set 40 y that changes in details may be made without i cogs,two and one-half times'0.6 or 1.5 revolutions. This will turn the dial 63 1.5 revolutioiisfrom figure 9 and hence wil-l show 1 4,while two-tenths'revolutions will be imlsiarted to the dial 64, making it show 5. imultaneously with this, the third differ- 'ential wheel -of set 21 will turn its selective' pinion, comeshing with the seventh series of cogs, three and one-half times 0.6, or 2.1 revolutions. This will a'ctuate the dial 64, 2.1 revolutions from figure 5, making it show 6, while two-tenths revolutions will be transmitted toY dial .through means K,

causingit to. show digit 2.

The opera-tion is now complete and the '.multiplicand dials E show the number 758,

- the multiplier dials G show the number 349, while the product dials H show the izov product of these numbers,264,542.

The mechanism for re-setting the machine has been hereinbefore fully set forth, how- 'jever, it is to be noted that if the multiplicand is involved in subsequent calculations, it is not necessary to re-set the multiplicand dials.

'When the multiplier dials G show zero, the cogsof selective pinions 36 are free to slide` radially over the face -of the differential wheel. From an inspection of Fig. 9 of the drawings it will be seen that on the vertical or central radial line of the teeth shown the teeth are parallel and it is along this line 5 that the corresponding pinion is adapted to slide.

While in the resent example, the machine is adapted or multiplying two figures of'three digits each, it is obvious that a machine of greater capacity can be constructed f. .by simply increasing the number of sets of differential cog wheels, sets of selective pinions and their operating mechanisms` and ideparting'from the spirit or scope of my invention; but

. I claim:-. Y

1. In a multiplying machine, the combination offga .plurality of differential wheels, each wheel'`r comprising a plurality of gears concentric with vthe axis thereof, means for simultaneously rotating all of said wheels inaccordance with .a digit of the multiplier,

1 pinions, relative to the respective differen- `'tial wheelsin accordance with the digits of 'l the multiplicand.

2. In a multiplying machine, the combination of a plurality `of sets of differential wheels, each wheel comprising a plurality of p gears, concentric with the axis thereof, means adapting each set to be rotated independently in. unison, the gears of all the differential wheels being arranged in the same plane, and the several sets of wheels indented denominationally, a pinion for each differential wheel, adapted by sliding radially' of the respective wheels to coperate with the lgears thereon, a plurality of 'shafts upon the differential wheels, and product dials operated by said shafts.

3. In a multiplying machine, the combination of av plurality of sets of differential wheels, each wheel comprising a plurality of gears, concentric with the axis thereof, the axes of all of said wheels being parallel and the gears thereof in the same plane, a correspondingplurality of sets of pinions adapted to coperate with the gears of the respective differential wheels, a plurality of denominationally arranged shafts upon which said pinions are mounted to slide ra- .dialluyr of the respective differential wheels, said shafts carrying the pinions of the respective sets inv denominational relation, means connecting the initial and succeeding pinions of each set for simultaneous sliding movement on the respective shafts, dials connected with said last named means for indicating the extent' of sliding movement of the connected pinions, means for rotating each set of differential wheels independently, dials for indicating the extent of such rotation and product dials operated by said shafts andpinions.

4;. In a multiplying machine, the combination of a plurality of sets of differential wheels, each wheel comprising a pluralit of gears concentric with the axis thereo means for mounting said differential wheels with their axes in parallel relation with all of said gears in a plane at right angles to the axes of the wheels, said sets of differential wheels being indented denominationally, a corresponding plurality of setsof pinions adapted to coperate with the gears of the respective differential Wheels by movement radially thereof, a plurality of shafts upon which said pinions are slidably mounted, said shafts being arranged denominationally in a plane parallel to the plane of said gears, means connecting the initial and succeeding pinions of each set for simultaneous sliding movement on said shafts, means connecting each of said last named means with a dial for indicatin the extent of movement of said pinions, nger operated means for simultaneously1 moving the respective dials and the correspondin pinions to represent digits of the 'multiplb cand, gear connections for rotating each set of differential wheels independently dials 45 of said gears being arranged in the. same adaptedto' 'be simultaneously operated with said gear connections for indicating the extent-,0f rotation of said differential wheels, and to represent the multiplier digits, and product dials adapted to ,be'rotated by said shafts. and pinions.

In a multiplying machine, the combination of a plurality'7 of sets of differential Wheels, each wheel comprising a plurality of gears concentric with the axis thereof,

' means for mounting said differential wheels with their axes in parallel relation with all ofrsaid gears in a plane at right angles to the axes of the Wheels, said sets of differential wheels `being indented denomination- 4ally, a corresponding plurality of sets of pinions adapted to coperate with the gears of the respective Adifferential wheels, bv

movementl radially'thereof, a plurality o'f shafts upon which said pinions are slidably mounted, said shafts being arranged `denominationally in a plane parallel to the plane of said gears, means connecting the initial and succeeding plnlons of each set for simultaneous sliding movementon .said

shafts, means connecting each of said last named means with an indicating dial for A lndicating the extent of movement of said 'differential Wheels, and to represent the multiplier digits, product dials adapted to be rotated by said shafts and pinions, and l carrying mechanism associated with said dials for transfer of the tens.

6. In a multiplier machine, the combination of a plurality ofy sets of differentialwheels, each Wheel comprising a plurality of gears concentric with the axis thereof, all

plane at right angles to the axes of Said wheels, means for rotating each set of differential Wheels independently, said lsets of Wheels being indented denominationally as for partialeproducts in multiplying, multiplier dials connected with said last named means and adapted to be operated thereby 'to indicate the respective multiplier digits,

Vconnected with said last named means and pinions of each set on the respective shafts, multiplicand dials adapted to be operated by said last named means for positioning said simultaneously sliding lpinions in faccordance with the digits of thejmultiplicand,

vproduct dials adapted tofbe operated Iby said shafts when rotated by the pinionsand carrying mechanism associated ,with said product dials for transfer of` thev tens. Q 'f 7. In a multiplying"machine, thefcolribi-"ij nation of a Iplurality of setsofdifferential wheels, each wheel comprisinga plurality of gears concentric with the axis thereof, all of said gears being arranged in the same plane at right angles to the axes of said 8 wheels, means forl rotating each set ofdif, ferential wheels indep'endentlygsaid wheels 'being indented denominationallyas for 'partial products in multiplying,l multiplier 'dials adapted to be operated thereby to indicate the respective multiplier digits, a plurality of pinions one for each diiferential Wheel, adapted to cooperate. with the respective gears thereof, a plurality of shafts extending transversely of said differential Wheels in denominational relation therewith, upon which said pinions are adapted to slide, meanswhereby the individual pinions are adapted to rotate the respective shafts, means including finger Wheels fory simultaneously sliding the initial and succeeding pinions of -each set on the respective shafts, multiplicand dials adapted to be operated by said last named. means for'positioning the pini ions in accordance ivith the digits of the multiplicand, product dials adapted to be operated by said shafts .when rotated by the pinions, carrying mechanism associated With sald product dials for transfer of the l tens, means for simultaneously restoring all of sa-id product dials to zero independently Qf the differential gears, and means for restoring said multiplier 'dials to zerq.

8. A multiplying machine comprising in 1 combination, a plurality of product dials arranged in a row to represent units, tens,- hundreds, thousands, tens of thousands, and hundreds of thousands, from the right to theleft of the machine, three sets of differ- 1 ential Wheels, each set comprising three wheels adapted to rotate in unison, each wheel provided with nine series of concentric circumferentially disposed cogs on its face, said sets of Wheels arranged' with 1 the initial Wheel of the primary set nearest the right of the machine, the initial wheel of the second set and the second lWheel of the primary set next adjacent to the left, the initial Wheel of the third set, second 1 Wheel of the second set, and third Wheel ofthe primary set, next adjacent to the left, the second Wheel of the third set, and the third Wheel ofthe second set next adjacent to the left, and the third wheel of 1 the third set,v next adjacent to the left; three sets of selective pinions, each comprising three pinions, and arranged with a first set fortthe initial wheels of the three sets of differential wheels, a second set for the second Wheels of said sets of differential Wheels, and a' third setfor the-'third wheels of thepsaid sets of differential Wheels, mechanisms for moving said sets of selective pinions one set independently ofzanotherto .arrange the pinions of the sets in cov-.meshing relation with uniformly selected series of cogs of theirrespective sets of differential Wheels, means for imparting movement .of the pinion of the initial Wheel of the primary set of differential Wheels to saidI unit product dial, means for impartin movement of the pinion of the first Whee of theV second set and the second wheel of the pri'- third set,second wheel of the second set, and v the third wheel of primary set ofi differential wheels, to said dial displaying hundreds,

ions of the second Wheel of'the third set and the third wheel of Ithe second Set of '-means'for'imparting movement of thefpinv differential wheels'to said dial displaying tens of' thousands, and. means for im artm;

movement of the pinion of the thir Whee .of the third yset of differential wheels to said dial displayinghundreds o f thousands, and' 'devices coperating with vsaid product dials whereby one is moved one digit upon a com-- plete turn Vof the right. t

GEORGE vM. BACON;-

next adjacent dialat theA 

